Segment Information Balance Sheet Data (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) segment	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Operating Segments | segment	4
Total Assets	$ 6,114,070	$ 6,191,493
Entertainment Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	2,372,426	2,380,129
Recreation Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	2,042,541	2,102,041
Education Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	1,398,280	1,429,992
Other Reportable Operating Segment [Member]
Segment Reporting Information [Line Items]
Total Assets	206,405	199,052
Corporate / Unallocated
Segment Reporting Information [Line Items]
Total Assets	$ 94,418	$ 80,279